Flame retardant cable refers to a cable material that is not easily combustible and has difficulty spreading flames in the direction of the cable,. Flame retardant cables have specified flame retardant properties. Under specified test conditions, if the sample is burned and the fire source is removed, the spread of the flame on the sample is only within a limited range and extinguishes on its own.

The characteristic of flame-retardant cables is to delay the spread of flames along the cable, preventing the fire from expanding. Due to its low cost, it is a widely used cable variety in fire-resistant cables. Whether it is a single cable or a bundle of cables, the spread of flames can be controlled within a certain range when the cable self ignites, thus avoiding major disasters caused by fire propagation and improving the fire prevention level of the cable line.

When it comes to this level of fire prevention, it is necessary to mention the widely used UL-94 flammability performance standard. It is used to evaluate the ability of materials to extinguish after being ignited, thereby determining the flame retardant rating of materials. The flame retardant level gradually increases from HB, V-2, V-1 to V-0:

HB: The lowest flame retardant rating in UL94 standard. Require a combustion rate of less than 40 millimeters per minute for samples with a thickness of 3 to 13 millimeters; Samples less than 3 millimeters thick have a combustion rate of less than 70 millimeters per minute; Or extinguish before the 100mm mark.

V-2: After two 10 second combustion tests on the sample, the flame extinguishes within 60 seconds. Burning materials may fall off.

V-1: After conducting two 10 second combustion tests on the sample, the flame extinguishes within 60 seconds. No combustibles can fall off.

V-0: After conducting two 10 second combustion tests on the sample, the flame extinguishes within 30 seconds. No combustibles can fall off.